How do I Troubleshoot a Lincoln Electric SP-170-T?
The Lincoln Electric SP-170T is a single phase, 240-volt, 170-amp portable MIG welder designed for automotive, on-site contractors and maintenance applications. Lincoln Electric is a world leader in the design, development and manufacture of stick welders, TIG welders and MIG welders. However, as with most machines with multiple components, wear and tear can occur. Whether it be an issue with the gun trigger or wire feed, the problems are relatively simple to diagnose. Before taking your welder in for a service, run through a few troubleshooting steps.
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Instructions
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Check that the power switch is set to "ON" if there is no wire feed, weld output or gas flow when the gun trigger is pulled, and the fan does not operate. Reset the circuit breaker.
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Allow the machine to cool if there is no wire feed, weld output or gas flow when the gun trigger is pulled and the fan operates normally. It could be that the thermostat tripped due to overheating. Try welding at a lower duty cycle. Check for air flow obstructions in the lines. Inspect the gun trigger connections for any damage. Replace the gun trigger, if necessary.
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Ensure that the correct drive rolls are installed in the machine if the wire drive motor is running and there is no wire feed when the gun trigger is pulled. Check for a clogged cable liner or contact tip. Verify that the cable liner and contact tip are the correct size.
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Check that there is sufficient gas supply if there is low or no gas flow when the gun trigger is pulled and the wire feed, weld output and fan are operating normally. Check the flow regulator and gas hoses for any damage. Inspect the gun connection to the machine for any obstructions or leaky seals.
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Inspect the gun and gun tip for wear or damage if the arc is unstable or the gun is difficult to start. Ensure that the gun tip is the correct size. Check the work cable for loose or faulty connections.
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Tips & Warnings
Turn the engine off before troubleshooting and maintenance unless the maintenance requires it to be running.
Operate the machine in well-ventilated areas.
Wear safety goggles and gloves when welding.
Do not place your hand near the engine fan when the engine is running.
Do not dip the electrode in water for cooling.
Always remove fire hazards from the welding area. If this is not possible, cover the fire hazard to prevent the welding sparks from starting a fire. Avoid welding near hydraulic lines.
References
- Photo Credit welding image by glgec from Fotolia.com
